865478460 has 192 divisors, whose sum is σ = 3119284224. Its totient is φ = 174009600.

The previous prime is 865478459. The next prime is 865478513. The reversal of 865478460 is 64874568.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 140199 + ... + 146241.

It is an arithmetic number, because the mean of its divisors is an integer number (16246272).

Almost surely, 2^865478460 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 865478460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1559642112).

865478460 is an abundant number, since it is smaller than the sum of its proper divisors (2253805764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

865478460 is a wasteful number, since it uses less digits than its factorization.

865478460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6104 (or 6102 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The square root of 865478460 is about 29419.0152792373. The cubic root of 865478460 is about 952.9835875626.

The spelling of 865478460 in words is "eight hundred sixty-five million, four hundred seventy-eight thousand, four hundred sixty".